Occurred to me recently, out of the blue: "for free".
Not an expression which bothers me much ("life's too short") -- although I don't think I'd ever use it, in speech or writing; but I have a friend who loathes it with a passion. He is a great pedant about language-use of all kinds; and "for free" is one of many things on that scene, which make him furiously angry. Basis: in proper English, if something has a cost / price ("in cash and / or kind"), it's "for" whatever that price is -- if it has no cost, then it's just "free".
My friend tells me of how, some fifty years ago, he and his schoolfriends used "for free" as a satirical, gently authority-mocking, joke and catchphrase -- because everybody knew it was nonsensical (see above). They would never use it "in real life". It makes him apoplectic that nowadays, it has come to be the common usage re something which one does not have to pay for -- shows up regularly and frequently even in British "quality" newspapers. In principle, I see his point -- in practice, I think it not a hill to die on or otherwise dramatically and spectacularly end one's life over. Language is a democracy, and changes and evolves... and I see the alliterativeness of "for free", as likely being irresistible.
Wonder whether "for free", is a tiresome trendy expression (or worse) for anyone else on the board?